package com.ty.day4.home;

/**
 * Created by IntelliJ IDEA.
 *
 * @author : txy
 * @create : 2023/11/17 17:33
 */
public abstract class Bird extends Animal  {
    String plumage;
    Wing wing;
    Boolean hornyTeethAreUseless;
    abstract void doneEgg();

}
class Wing{

}
